Red Seal Drywall Finisher and Plasterer Practice Exam

What is one recommended step before applying paint over drywall?

1. Apply a layer of drywall compound

2. Ensure the surface is smooth and dust-free

3. Soak it in water

4. Apply a thick coat of primer without preparation

The correct answer is: Ensure the surface is smooth and dust-free

Before applying paint over drywall, ensuring that the surface is smooth and dust-free is essential for achieving a professional finish. A smooth surface will allow for better adhesion of the paint and help to create an even application, preventing issues such as streaks or uneven color. Dust on the surface can interfere with the paint's ability to adhere properly and can lead to a rough texture once the paint dries. Additionally, a clean surface helps to avoid spotting and other imperfections in the finish, which can be especially noticeable on lighter colors. Preparing the drywall by removing dust and debris is a crucial step in the painting process that directly impacts the quality and longevity of the paint job. While applying a layer of drywall compound can create a smooth finish, it is typically done during the finishing process rather than as a step prior to painting. Soaking drywall in water is not a common or recommended practice, as it can damage the material. Moreover, applying a thick coat of primer without proper surface preparation can result in poor adhesion and a subpar finish. Therefore, ensuring the drywall is smooth and dust-free stands out as the most important preparatory step.